Roof sump



Feb. 10, 1931. J, RM 1,791,512

ROOF SUMP Filed Oct. 17, 1929 w I \I 5 6 e 2 22 5 1" ATTORNEY.

screen ring supportable thereon and Patented set. 1e, iesi JOHN sonoanran, or ntsnnnnn PARK, raioirrean noon SUM]? Application filed Gotober 1?, 1929; 1 Serial No. 400,437.

This invention relates to roof sumps, and the object of the invention is to provide a sump consisting of a bowl having a flange over which the roofing may extend and a secur ing the roofing in place at th periphery of the aperture about the bowl with the base of the ring practically below the plane of the adjacent roof portionwhereby the sump is in effectpositioned in a depression whereby all water may drain into the sump.

Heretofore, it was usually the practice to provide the screen ring with a base portion slightly above the plane of the roof which tends to trap water to some extent on the roof. 7

p A feature of the invention therefore is in providing the bowl, screen ring and a cover whioi are not bolted or fixedly secured together as has been usually the practice, the base of the screen ring and the flange of the bowl on which it is positioned being formed to engage the roofing, and the screen ring being of suilicient weight to retain the roofing in place and the parts are readily separatable for the purpose of cleaning the sump. In previous constructions in which the sump parts are bolted together, the said parts hecome rusted after a period of use making it practically impossible to separate the parts for cleaning purposes.

A further object of the invention is to provide a screen ring with outstanding ribs from the screen portion proper to prevent close contact of material such as paper from stopping the flow through the screen.

Another object of the invention is to provide a cover member for the screen element or ring not attached to the ring and separable therefrom permitting ready access to the interior of the ring and bowl and further to so form the cover as to prevent paper and like waste material from lying closely over the apertures provided in the cover and therefore stop flow into the sump through the cover. The reason for this arrangement is that oftentimes the screen ring itself become so covered about the exterior with waste material as to prevent fiow directly into the screen and thus the cover is perforated to still permit flow thereinto under such condition and to obviate possibility of stoppage of the flow into the cover portion thesaid cover is formed to prevent any close contact 01" wast material in a manner to close the apertures of 55 the cover member. 7

These and other objects and novel features of the invention are hereinafter more fully described and claimed, and the preferred form of construction of a root sump eman bodying my invention is shown in the accompanying drawings in which l is a plan view partly in section of my improved sump. Fig. 2 is a vertical section thereof show- 5: ing the manner of attachment of the same to a roof. I I

Fig. 3 is a sectional View of a guard that may be utilized in conjunction wi h" the cover member. v

The sump consists of a bowl 1, a screen ring 2 and a cover 3. The bowl has an outlet l in the bottom thereof and the base the bowl about the outlet and up the side walls thereof for a portion of their length is provided, with the ribs preferably formed to cause a swirl of fluid from left to right such being the natural tendency of the water in the Northern Hemisphere although these ribs may be arranged in a reverse direction so to cause the water to swirl in bowl from right to left. The bowl terminates in an upstanding fiange 6 and an outwardly extending lateral flange 7 shaped to provide a pocket 8 and a pocket '9 as shown in Fig. 2. a, This lateral flange 7 also is provided with a depending flange 10 which rests on floor beams or elements indicated at 11 and on which the roofing 12 issupported in any approved manner. It is to be noted that, in laying the roofing, the sump bowl described is positioned on the recesses 13 provided therefor in the roof structures and that the roofing 12 may be laid completely over this bowl and subsequent to the laying of the roofas ing the central aperture is provided by cut ting the roofing at the line 14 to provide an opening therethrough. To assist in determining the size of the opening to be made in the roofing, the rib 15, which forms the 2 dividing wall between the recesses S and 9 in the lateral flange, provide a guide for the workmen in cutting the aperture along the line 14 practically at the point of the rib 15 which is made V shaped for the reason that it enables the operator to press the roofing down onto the flange of the bowl and the sharp edge of the rib 15 causes a visible indication in the roofing where the cut is to be made in providing the aperture.

The screen ring is a casting having a bottom ring portion 16, the upper face of which is practically horizontal and due to the drop in the lateral flange 7 of the bowl is below or at least not above the plane of the adjacent root surface. The bottom edge of this ring 16 is formed with a depending flange 17 entering the recess 8 of the bowl flange 7 and is also provided with a V shaped rib 18 over the depression 9 and somewhat closely adjacent the rib 15 of the bowl flange when the parts are assembled as shown in Fig. 2. Before placing the screen ring on the roofing, an elastic cement isfillcd into the recesses 8 and 9 and up over the edge of the roofing proper lying between the base ring 16 of the screen element and the flange 7. The screen ring then is placed thereon, formed of cast metal and which being of considerable weight, forces down into the elastic cement and encases the cut edge 14 of the roof in the cement. The pressure of the rib 18 on the roof edge in conjunction with the cement securely holds this cut edge of the roof in place. This screen ring further has a series of vertical ribs 19 positioned in radial relation about this screen ring and of a con siderable width as will be understood from Fig. 1. Between these ribs of greater width are a series of smaller ibs 2O therebetween roviding narow spaces 21 betwen the several ribs 19 and 20 through which fluid may flow through the screen into the bowl. As will be understood from Fig. 2 the smaller ribs 20 terminate at the ring 22 while the ribs 19 of greater width extend thereabove and are formed at the ends to receive a ring like base 23 of the cover.

The cover consists of this base ring 23 and a series of radial ribs 2% positioned thereon extending to the central portion 25, the ends 26 of which extend beyond the outer edge of the vertical ribs 19. These projecting ends 26 of the radial ribs provide points which tend to tear paper that may be blown thereonto and thus prevent the paper from lying in close. contact with the cover. The cover also is provided with the circular strips 27 in spaced relation extending between the radial ribs 245 providing spaces 28 therebetween through which fluid may flow. Preferably the cover is positioned on the screen ring with the radial ribs thereof practically registering with the vertical ribs 19 of the screen member therebelow. It will be noted that this screen ring with its wide ribs 19 holds any waste material that may be washed to the sump and prevents covering the screen and thus will permit water to low through and over deposited material between the ribs 19 into the screen ring and thence to the bowl. This is true also of the radial ribs 24:. The paper and like material that may be caught on the top of the sump is held above the spaces 28 through which fluid may flow through the cover. Thus, by the construction described the sump portion above the roof is constructed to prevent choking of the sump by material that may deposit on the roof and be washed to the sump by a flow of water entering the sump.

Preferably the bowl is also provided with a deflector having the vertical legs 29 integral with a cap element 30 which has apertures formed therethrough and is provided with a central depression 31. These legs are formed with depending fingers 32 eX- tending inside of the outlet conduit a connected with the bowl bottom which is provided with a threaded hub 83 for this purpose. The deflector provides a further means for preventing material from entering the outlet a such for instance as sticlrs and the like that may pass endwise through the spaces 21 of the screen ring.

The sump is oftentimes positioned where considerable sand is blown onto the roof and to prevent sand directly entering into the sump I provide the cover plate 3 1, shown in Fig. 3 which is attachable to thecentral portion 25 of the cover member as by means of a screw L5. This cover extends outwardly over the ribs 21 and therefore is spaced from the circular bars 27 of the cover permitting a iiow of water between the ribs and through the apertures 28 beneath the plate 3 1. Preferably this plate 34 extends outwardly beyond the outer ends of the radial ribs as is suggested in Fig. 8.

By the described arrangemei'it of parts it may be readily seen that, in the event the bowl or outlet become clogged with material, the screen ring may be readily removed from position thus opening the bowl and enabling the material clogging it to be removed. The screen ring is thereupon replaced in position preferably with a new elastic cement to insure a tight seal at the roof edge.

The device is practically as cheaply manufactured as the present devices for this general purpose it being formed of simple castings requiring no particular machine work as there are no close fits to be provided between. the ring of the screen member and lateral flange of the bowl or between the cover ring 23 and the vertical ribs 19 of the screen ring or between the deflector element having the legs 29 supported at the outlet of the bowl. The parts at these points of junction may be loosely fitted and are read- Cit ily assembled without necessity of manipulation of the bolts or fastening devices of some nature to secure the parts together. Further, the device is cheaper in erection in that subsequent to the placing of the bowl the roofin can be laid over the entire roof irrespective of the number of sumps to be mounted thereon and the roofing out at the sumps subsequent to the laying thereof, the flange of the sump providing a guide for the formation of the apertures through the roof which is usually of tarred paper or like material that may be used for this purpose.

Having thus described my invention, what I claim is l. A roof sump comprising a bowl having an outlet in its bottom and a. peripheral flange about its open end over which roofing may extend, a screen member having ring like base, the roofing extendnig between the said base and flange, a cementitious filling betwee the base and flange and on opposite sides of the roofing, the said ring and base being unattached and the weight of the ring being depended upon to hold the roofing in place, said flange on the bowl having a recess and a rib in the base of the screen member extendin into the recess preventing lateral displacement of the screen member.

2. A roof sump comprising a bowl having an outlet in its bottom, an upwardly inclined peripheral flange about its open end over which the roof covering may extend, said flange having depressions separated by a rib, a screen member for positioning on the said flange and roofing member and having projeoting portions in its bottom surface in opposed relation to the depressions of the flange, cementitious filler between the flange and base of the screen member and on opposite sides of the edge of the roofing lying over the flange, the screen member being unattached to the bowl or flange thereof, and a projecting portion on the base of the screen member engaging the peripheral edge of the roofing about the bowl to bindingly secure the roofing in place by the weight of the screen member, said bowl having a series of ribs extending from the side to the outlet arranged to cause fluid entering the bowl to swirl or rotate in passing to the outlet, and a deflector member positioned in the bowl over the outlet having a series of legs tending to prevent material flowing into the outlet while permitting the fluid to pass thereto.

3. A roof sump comprising bowl and a screen member supported thereon and una tached thereto, the screen member having a ring-like base portion below the plane of the roofing, a series of vertical ribs of considerable width and vertical bars therebetween providing a preventing a flow of tcrial into the bowl of a charac er to obstruct flow through the outlet and a cover member for th said screen element unattached thereto and held from lateral displacement thereon. 1

4. A roof sump comprising a bowl memher having a lateral flange at its open end and an outlet in its bottom, said flange providing a means for suspending the bowl in a roof structure, the roofing material extending over the said flange, a screen member havi a base fitting over the flange and engagin the edge of the roofing, a cementitious material between the screen base and the the upper surface of the said base portion of the screen being not higher than. the plane of the surrounding roof surface, said screen member comprising aseries of vertical bars of considerable width and parallel spaced bars therebetween providing a grating through which fluid may flow to the bowl and preventing entrance of material of a size larger than the width of the openings between the ribs and bars, a cover member comprising a ring-like element l. shaped in cross sec 11 lying on the u A ends of the said ribs and holding the cover from displacement, said cover consisting of a series of radial ribs and bars extending therebetween in spaced relation to provide a grating, the upper faces of the radial ribs bein above the bars and providing a means for preventing material to Contact the bars in a manner to prevent flow of fluid through the spaces therebetween.

5. A roof sump comprising a bowl having an outlet in its bottom and a peripheral flange at its upper end formed generally on a clownward incline toward the open end of the bowl, the roof covering extending over the flange and terminating short of the open end of the bowl, a. screen element having a ring, like base portion positioned on the flange and engaging the roof covering between the flange and screen element, a cementitious material between the said flange, roof covering and screen element, the ring-like base of the screen element having the upper face thereof not higher than the plane of the upper surface of the surrounding roofing element, the screen element being formed with a. depend ing flange and the bowl flange having a re cess into which the said screen flange extends holding the screen element from material lateral displacement.

6. A roof sump comprising a bowl having an outlet in its bottom and a peripheral flange about the open end thereof, a screen member unattached thereto and having a base part positioned over the said flange, the base part and flange being formed to prevent lateral displacement of the screen member relative to the bowl, the roof covering extending between the screen base and bowl flange, a cover member for the screen element formed to provide a series of apertures through which fluid may flow, ribs on the cover member, the upper faces of which are above the apertures of the cover preventing material lodging on the cover to close the apertures, and a deflector member in the bowl over the outlet having a series of Vertical legs in spaced relation and a cap thereover having; apertures therein and a central depressien.

7. In a roof sump, a bowl, ascreen member supported thereon and being; unattached thereto, the two parts being so formed that the weight of the screen n'iemher maintains the parts in relative position preventing lateral displacement, a cover member formed of a grating, a series of radial ribs extending outwardly, the upper surfaces of which are above the grating portion of the cover, and an imperforat-e plate secured to the cover and extending over the upper surface of the said ribs.

In testimony whereof, I sign this specification.

JOHN SCHURMAN. 

